All DRD testcases fail on macOS Ventura 13.6 Intel

[paulfloyd]

The root cause of the problem is the need to handle the dl_cache.

   //--------------------------------------------------------------
   // Initialize the dyld cache, which is required with macOS 11 (Big Sur) and onwards
   // as some system libraries aren't provided on the disk anymore
   //   p: none
   //--------------------------------------------------------------
#  if defined(VGO_darwin) && DARWIN_VERS >= DARWIN_11_00
   VG_(dyld_cache_init)();
#  endif

This triggers some mmaps which in turn causes

static
void drd_start_using_mem_w_perms(const Addr a, const SizeT len,
                                 const Bool rr, const Bool ww, const Bool xx,
                                 ULong di_handle)
{
   DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)());

   drd_start_using_mem(a, len, False);

   DRD_(suppress_relocation_conflicts)(a, len);
}

To be called.

At this point the running tid is 0 (which is INVALID). The set running tid function has an assert to check that the tid is not INVALID.

Boom!

I tried faking a running tid of 1 for the call to dyld_cache_init. But DRD also maintains a record of the running tid in DRD_(g_threadinfo) so that isn't enough.

So the question is how to we get the two calls to ML_(notify_core_and_tool_of_mmap) in try_to_init_header to not cause this assert in DRD that is assuming that a thread is running.